| CPC E05F 15/619 (2015.01) [E05F 15/41 (2015.01); E05Y 2201/21 (2013.01); E05Y 2400/20 (2013.01); E05Y 2900/531 (2013.01)] | 5 Claims |
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1. An opening and closing device for a side door configured to enable a door of a vehicle to be automatically opened and closed with respect to a vehicle body, the opening and closing device comprising:
a housing configured to be fixedly disposed in the door and having a receiving space therein;
a drive motor disposed in the receiving space of the housing and comprising a drive shaft;
a worm gear connected to the drive shaft and configured to rotate together with the drive shaft;
a worm wheel configured to engage with the worm gear and rotatable by receiving a rotational force from the worm gear;
a pinion gear configured to rotate in conjunction with the worm wheel; and
a rack gear having one end configured to be hinged to the vehicle body, the rack gear being configured to be engaged with the pinion gear to convert rotational motion of the pinion gear into linear motion,
wherein the worm gear has a reversible structure, wherein the worm gear is rotatable by receiving a rotational force of the worm wheel when the worm wheel rotates, so that, when the drive motor rotates in an automatic mode, the worm gear is configured to rotate the worm wheel, and when a user manually rotates the door in a manual mode, the worm gear is rotatable by the rotating worm wheel,
wherein the drive motor is connected to one end of the worm gear, and a brake configured to stop rotation of the worm gear is disposed at another end of the worm gear, and
wherein the brake is configured to remove a braking force when an electrical signal is applied to the brake and to apply the braking force when the electrical signal is removed from the brake.
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